In the 2nd room, which is underwater where the firebreathing heads need to be frozen I encountered the following bug:
Having accidentally lost the sword (retrieved from room1) which is needed in room 3, we wanted to go back to get it at room 1. However, the underwater (nothern) Stone Wall which should allow us passage back to the above water portion of the puzzle does not open (i.e. the wall does not break down when I pull the Lever). It did function once before, but is now consistenly bugged. Moreover, using auto-attack, I was able to attack an enemy through the Stone Wall, and the enemy proceeded to go through the wall as if it was not there, and attack me in melee combat.
Also, freezing all the flamethrowing heads in room 2, and proceeding to room 3 did not fix the bug.
tl;dr: stuck in room 2 of Flame Temple Tombs. nothern Stone Wall Lever unresponsive.
